<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Mouse</title>
    <style>
      img {
        width: 50px;
        height: 50px;

        position: fixed;
        left: 0;
        top: 0;
      }
    </style>
  </head>

  <body>
    <img src="./a.png" alt="" />
    <script src="./on_mouse_move.js"></script>
  </body>
</html>
